LineArt icons came out as is a result of many months of designing and experimenting with line-based pictograms. My ultimate aim was to create something distinct, so every individual pictogram consists of a combination of two line weights, thin and thick. The thick one usually encompasses the general icon shape, while the thin one further describes it visually.

The file types included are: AI, EPS, SVG, PSD and PNG. The base-line grid is optimized for 24X24 px, so keeping up the progression of doubles (48X48, 96X96 etc.) will retain maximum compatibility and crisp look.

If this Ultimate pack is too big for you, there is always the "Essentials" pack to get a quick taste: https://creativemarket.com/pixelbazaar/16580-Lineart-Icons-%E2%80%94-The-Essentials